Type-writing machine.



L. NEY. TYPE WRITING MACHINE. IAPPLIOA'ITION FILED MAY 25,1909.

989,922." 1 Patented Apr. 18,1911.

MTNESSESi leasing mechanism.

UNITED STATES PATENT oar 0E.

LOUIS 1\lEY, OF HARTFORD, G()I\l'I TEG'.llI CUT, ASSIGNOR T0 UNDERWOOD TYPEWRITER' COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Apr. 18, 1911.

Application filed May 25, 1909. Serial No. 498,258.

To all whom it may concern:

.Be it known that I, Louis NEY, a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specificati-on.

' This invention relates to devices for releasably connecting the platen to the line space wheel of a type-writing machine, to permit the platen to be rotated independently of the line space wheel.

The principal object 'of this invention is to provide, at a low cost, a simple and durable device of this character readily applicable to existing machines.

The clamping movement isgiven to the line-space wheel by means of a finger wheel loosely mounted on the platen axle, and provided with means whereby it is cammed along the axle against the line-space wheel.

An adjustable device is provided to vary the clamping pressure on the hue-space wheel.

In the accompanying drawings, Figure 1 is a View of the platen and platen frame of an Underwood front strike writing machine, with the present improvements applied thereto. Fig. 2 shows perspective views of the several parts of the platen-re- Fig. 3 is a sectional view showing the platen axle released from the line-space wheel. Fig. 41 is a similar view showing the platen axle clamped to the linespace wheel. Fig. 5 is a fragmentary perspective View of a finger wheel, showing its cam.

The usual platen 1 is fixed on an axle 2 journaled in a'platxm frame 3, said axle 2 having fixed upon its ends the usual hand wheels 4 for rotating the platen. A line space wheel 5, usually engaged by a spring dctent 6, is provided with a hub 7, whereby it is loosely mounted on a boss 8 fixed on the axle 2, the inner end of said boss being formed with a flange 9, fitting in an annular recess 10 in the line-space wheel 5, and against which the linespace wheel may be clamped. A finger. wheel 11 is loosely mounted on the axle 2, and provided on its outer check with aface or helical cam 12, to engage a corresponding cam 13 secured on the axle 9..

When thefinger wheel isrevolved, the cam 12 travels upon the cam 13, with a tendency to force the cam 12 along the axle toward on wheel 11 and having its edge beveled at diametrically op pbsite portions, as at 17, to

form a two-part cam. The cam 13 may be correspondingly formed, as at 18. The cam 13 is formed on the face or cheek of a collar which is threaded onto the platen axle, to be ustable therealong to vary the clampingpressure on the line-space wheel, to compensate for wear or for irregularities of manufacture. A nut 14 locks the cam where adjusted.

After slackening the lock nut 14, collar or cam 13 may be set Where required, and then the nut may be tightenedup. A collar 15, slipped on the end of the axle, preferably in the form of a hub of the hand wheel 4:, is adjustably secured onto the axle 2, by a set screw 16, and abuts against the nut 14, as shown at Figs. 3 and 4, to lock the nut and the cam 13 against accidental displacement toward'the left. Flats or dwells 19 are provided on the earns 12 and 13, to render the cams incapable of working the wheel 11 loose or of unlocking the platen. A spring washer 20 may be mounted on the axle 2, between the linger wheel 11 and the line-' space wheel 5, to prevent rattling of wheel 11 when released. A stop 21 on the cam 12 engages a stop 22 on the cam 13, to limit the movement of the finger wheel 11.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen and an axle having a shoulder or collar, of a line-space wheel loose on said axle, a' finger-wheel revolnble relatively to said axle and formed with a cam surface which engages a part fixed on the platen axle, to clamp the line-space wheel against said shoulder, means. being provlded for limiting the rotation of said finger wheel; and means for effecting fine adjustment facewise between said cam andsaid fixed part.

2. In a typewriting machine, the combination with a platen, an axle having a shoulder or collar, a line-space wheel loose on said axle, and a finger wheel also loose on said axle, of a cam-collar on the axle, its cam face engaginga part on the finger wheel to enable a turning movement of the latter to clamp the line-space wheel to the shoulder,

said cam-collar adjustable along the axle,

and means to secure the collar where adusted.

Brill a typewriting machine, the eombination with a platen, an axle having a shoulder-,-a line-space wheel and finger wheel both loose on said axle, and an adjustable cam collar threaded on said axle to engage a part on the fingerwheel, of a nut to bind said collar on the axle, and a sleeve to lock the nut.

t. In a typewriting machine, the combination with a platen, and an axle having a shoulder, of a cam upon said axle, a linespace ,wheel and fingernvhcel both loose upon said axle, and a part upon the linger wheel to engage the cam to enable a turning movement of the linger-wheel to clamp the line-space wheel against said shoulder, said cam provided with a llat or dwell to detain the finger-wheel in the platen locking position.

5; In a typewriting machine, the combination with a platen, and an axle having a shoulder, of a cam upon said axle, a linespace wheel and linger-wheel both loose upon said axle, a part upon the linger wheel to engage the cam to enable a turning movement of the finger-wheel to clamp the linespaee wheel against said shoulder, said eam' provided. with a fiat or dwell to detain the finger-wheel in the )laten-lool-:ing' position, and adjustable along the axle, and an adjustable member on the axle to secure said cam.

6. In a typewriting machine, the combination with a platen, and an axle having a shoulder, of a cam upon said axle, a linespace wheel and linger-wheel both loose upon said axle, a part upon the linger-wheel to engage the cam to enable a turning movement of the linger-wheel to clamp the linespace wheel against said shoulder, said cam provided with a llat or dwell to detain the wheel in the platen-locking position, and adjustable along the axle, an adjustable member'on the axle to secure said cam, and a set screw to secure said adjustable member.

7. The combination of a platen, a platen axle having a shoulder or support, said axle having a hand wheel fixed on one end thereof, a loose llIlU-SPHCO wheel, a loose handwhcel mounted between the fixed handwheel and the line-space wheel and having means to clamp said line-spaee wheel against said support; means being provided where- .by the loose hand-wheel is cammed along the axle against the line-space wheel; and a device ad ustable to vary the cammmg pressure or the loose hand-wheel agalnst the line-spaee wheel.

, 8. The combination with a platen having an axle, said axle being provided with a boss, of a line-space wheel loosely mounted on. said boss, a flange provided upon said boss against which the line-space wheel may be clamped, and a linger-wheel loosely mounted on said axle and provided with a face-cam to engage a corresponding cam fixed upon said axle to enable the handwheel, when rotating, to clamp said linespaee wheel against said flange; means being provided to ell'ect ustment of said cam along said platen axle,- to vary the pressure of the line-space wheel.

9. The combination with a platen having an axle, said axle being provided with a boss, of a line-space wheel loosely mounted on said boss, a flange provided upon said boss against which the line-space wheel may be clamped, and a linger-wheel loosely mounted on said axle and provided with a face-cam to engage a corresponding cam lixed upon said axle to enable the handwheel, when rotating, to clamp said linespaee wheel against said flange; means being provided to ell'ect adjustment of said cam along said platen axle, to vary the pressure of the line-space wheel; said cams belng provided with dwell portions to prevent loosen.- ing of the hand-wheel or line-space wheel.

10. The combination with a platen having an axle, said axle being provided with a boss, of a line-space wheel loosely mounted on said boss, a flange provided upon said boss again'st which. the line-space wheel may be clamped, a linger-wheel loosely mounted on said axle andprovided with a face-cam to engage a corresponding cam fixed upon said axle to enable the hand-wheel, when rotating, to clamp said line-space wheel against said flange; means being provided to ell'ect adjustment of said cam along said platen axle, to vary the pressure of the linespacc wheel; said cams being provided with dwell portions to, prevent loosening of the hand-wheel or line-space wheel, and a stop to limit the throw of the hand wheel.

11. In a typewriting machine, the 001m bination with a line space Wheel, of a platen I and axle rotatable relatively thereto, an abutment on the axle, a cam member on the axle, a linger wheel loose on the axle and having a coliperatingcam member whereby to clamp the line-space wheel to the axle, one of said cam members adjustable axially relatively to the other to vary the'clan'iping pressure.

12. In a typewriting machine, the combination with a platen and axle, and a linespace wheel relatively to which the axleaiid platen are rotatable, of an abutment fast on the axle, a rotatable finger wheel ,loose on the axle, means to cam the fingr wheel axially to elamp'the line-space wheel against the abutment, and means to limit the finger wheel to less than a complete rotation to 7 spaee Wheel relatively to which the axle and platen are rotatable, of an abutment. fast on the axle; a rotatable finger wheel shiftable along the axle in a straight line 5 having a cam terminating in a dwell por-. tion, and a fixed part on the axle operatively engaged by the cam when the finger wheel LOUIS NEY.

\Vitnesses:

W. M. DYORKMAN LYMAN D. BROUGHTON. 

